On May 15, Pfizer announced positive results from a phase 1b trial assessing treatment with the company’s investigational gene therapy PF-06939926 in ambulatory boys with Duchenne muscular dystrophy (DMD). Preliminary data indicated that the intravenous administration of PF-06939926 was well-tolerated during the infusion period and provided improvements across multiple efficacy-related endpoints at 12 months post-infusion, . . .